...Is possible, needs just a well-timed underwater walljump.
In the PCU room, go to as far as you can go, now you should stop because of the Speed booster wall, but fear not! Shoot the floor, and jump in the sparkling water, go left, and jump up (Beware the electric...Thingy.). Now, when in the little space of 16-pixels, press A Again, Samus will somersault. Now start UWJing, and proceed upwards, until you grab the ledge. Now there should be nothing on your way, take the lonely Missile package, and Continue left. Climb the wall and jump out of the water into the Controlling thing-whatever. This trick doesn't help you much, but it's cool to show it to your friends!
In the PCU room, go to as far as you can go, now you should stop because of the Speed booster wall, but fear not! Shoot the floor, and jump in the sparkling water, go left, and jump up (Beware the electric...Thingy.). Now, when in the little space of 16-pixels, press A Again, Samus will somersault. Now start UWJing, and proceed upwards, until you grab the ledge. Now there should be nothing on your way, take the lonely Missile package, and Continue left. Climb the wall and jump out of the water into the Controlling thing-whatever. This trick doesn't help you much, but it's cool to show it to your friends!
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